“…Mathematical models based on queuing theory, Markov analysis and using well-defined metrics such as throughput, response time, and utilization have been used in many network performance evaluations (Haverkort, 1998;Bolch, et al, 1998;Higginbottom, 1998). Other metrics utilized include network traffic performance (Adie, et al, 1998;Banerjee, et al, 1997), circuit overhead of switches Da Silva, et al, 1997), and equipment used and network conditions (Da Silva, et al, 1997).…”